How to Solve Excessive Fuel Injection Pulse Width?

[Eloise]

Below are the causes and solutions for excessive fuel injection pulse width in vehicles: 1. Check the oxygen sensor and coolant temperature sensor: Inspect whether the coolant temperature sensor has aged, and replace it with a new one if it has; 2. Observe idle speed: Excessive fuel injection pulse width usually needs to be considered together with idle speed. High idle speed and large pulse width are generally caused by signal distortion from the throttle position sensor or coolant temperature sensor; 3. Oxygen sensor malfunction: If the idle speed is normal but the injection pulse width remains high, then the issue is caused by a faulty oxygen sensor.